Solve for x
x=130
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300+3x=690
Multiply 150 and 2 to get 300.
3x=690-300
Subtract 300 from both sides.
3x=390
Subtract 300 from 690 to get 390.
x=\frac{390}{3}
Divide both sides by 3.
x=130
Divide 390 by 3 to get 130.
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